Valve stem compatible handles?

[Guidowitz]

I have a valve stem in shower with splines.
Wondering what type of stem this is called So I can shop for new handle that will receive these splines. Don't want to replace valve.

 

[Dj2]

Count the number of points around the stem, but don't count some of them twice. It looks like you should have 16.
Take this picture to a plumbing supply house (not HD or a corner hardware shop) and see if they can find a handle to match.

 

[Sponsor]

 

[Marlinman]

Auburn Brass Intl. still keeps the old Harden trim and parts. Your cartridge is modified Symmons TA-10. 16pt. Contact them and they will take care of you.

http://www.auburnbathintl.com/trimsect_harden.htm

 

[Sylvan]

Or buy a FITS all handle